Top Network Ports Every DevOps Engineer Should Know

In the world of DevOps, understanding network ports is essential for managing servers, applications, and infrastructure efficiently. These ports act as communication endpoints that allow different services to interact with each other.

Here’s a quick overview of some commonly used ports:

🌐 Web & Secure Access

• HTTP – Port 80
• HTTPS – Port 443

🔐 Remote Access & File Transfer

• SSH – Port 22
• FTP – Port 21
• RDP – Port 3389

🗄️ Databases

• MySQL – Port 3306
• MongoDB – Port 27017
• Redis – Port 6379

⚙️ DevOps & Monitoring Tools

• Kubernetes API – Port 6443
• Docker API – Ports 2375/2376
• Grafana – Port 3000
• Prometheus – Port 9090

🚀 Application & Messaging

• Tomcat – Port 8080
• Apache Kafka – Port 9092
• Elasticsearch – Port 9200
• Jenkins – Port 8080

📧 Email Services

• SMTP – Port 25

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💡 Why It Matters

Knowing these ports helps DevOps engineers:

• Troubleshoot connectivity issues
• Configure firewalls and security rules
• Deploy applications smoothly
• Monitor system performance

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🚀 Final Thoughts

Mastering network ports is a fundamental skill in DevOps. Whether you're managing containers, cloud infrastructure, or CI/CD pipelines, these ports are used daily.